the total number of bytes taken up in Cloud Datastore for the
statistic instance.

count

attribute is the total number of occurrences of the statistic
in Cloud Datastore.

timestamp

the time the statistic instance was written to Cloud Datastore.

STORED_KIND_NAME = '__BaseStatistic__'

bytes

A Property whose value is a Python int or long (or bool).

count

A Property whose value is a Python int or long (or bool).

timestamp

A Property whose value is a datetime object.

Note: Unlike Django, auto_now_add can be overridden by setting the
value before writing the entity. And unlike classic db, auto_now
does not supply a default value. Also unlike classic db, when the
entity is written, the property values are updated to match what
was written. Finally, beware that this also updates the value in
the in-process cache, and that auto_now_add may interact weirdly
with transaction retries (a retry of a property with auto_now_add
set will reuse the value that was set on the first try).

Statistics of the number of non root entities in Cloud Datastore by Kind.

There is an instance of the KindNonRootEntityStat for every Kind that is in
the application’s datastore that is a not a root entity. This stat contains
statistics regarding thse non root entity instances.

There is an instance of the KindRootEntityState for every Kind that is in the
application’s datastore and has an instance that is a root entity. This stat
contains statistics regarding these root entity instances.

This statistic has one instance per namespace. The key_name is the
represented namespace. NamespaceStat entities will only be found
in the namespace “” (empty string). It contains the total
number of entities stored and the total number of bytes they take up.

subject_namespace

the namespace associated with the statistic instance.

entity_bytes

the number of bytes taken up to store the statistic
in Cloud Datastore minus the cost of storing indices.